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In this paper we propose a two-way spectrum sharing protocol for the overlay cognitive radio network consisting of two primary users (PUs) and two secondary users (SUs). One of the SUs acts as a relay to assist the communication between the PUs while at the same time allowing for two-way transmission with the other SU. The communication process is done in two phases. In the first phase, the PUs and...
Relay selection (RS) is the one of the proposed methods in the literature to utilize cooperative diversity. When the source-relay channel information is not available at the destination, the RS technique does not exploit user diversity efficiently. The proposed solution of this problem in the literature is that the relays monitor all channels "end-to-end" and the mobile unit with the highest...
We describe the use of property-based peer trust to provide security in Sleeper, a new energy-efficient service discovery protocol which uses proxied advertisement and discovery to dynamically offload service discovery workload from power-limited devices. Property-based digital certificates have previously been used in trust-negotiation methods. In earlier work we developed a new method for secure...
The design of service discovery protocols which limit power consumption of devices has received little consideration but is an important problem because of the growing use of power-limited mobile networked devices. We describe Sleeper, a new discovery protocol which uses proxied advertisement and discovery to dynamically offload service discovery workload from power-limited devices. The advertisement...
The design of service discovery protocols which limit power consumption of devices has received little consideration but is an important problem because of the growing use of power-limited mobile networked devices. We describe sleeper, a new discovery protocol which uses proxied advertisement and discovery to dynamically offload service discovery workload from power-limited devices. The advertisement...
The design of service discovery protocols which limit power consumption of devices has received little consideration but is an important problem because of the growing use of power-limited mobile networked devices. We describe sleeper, a new discovery protocol which uses proxied advertisement and discovery to dynamically offload service discovery workload from power-limited devices. The advertisement...
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